FiltrationAdsorptive particles or granules of carbon usually obtained by heating carbon (such as wood). These particles or granules have a high capacity to remove certain trace and soluble materials from water. By jay@americanwatercollege.org | January 20, 2017 | Certification Exams . Distribution . Water Treatment | Tags: Activated Carbon, Adsorption, Certification Exam Prep, Distribution System, Filtration, Water Treatment